23817240 has 80 divisors (see below), whose sum is σ = 80063280. Its totient is φ = 6350400.

The previous prime is 23817239. The next prime is 23817251. The reversal of 23817240 is 4271832.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 436 + ... + 6915.

It is an arithmetic number, because the mean of its divisors is an integer number (1000791).

Almost surely, 2^23817240 is an apocalyptic number.

23817240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23817240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40031640).

23817240 is an abundant number, since it is smaller than the sum of its proper divisors (56246040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23817240 is a wasteful number, since it uses less digits than its factorization.

23817240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374 (or 7361 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 23817240 is about 4880.2909749317. The cubic root of 23817240 is about 287.7158656048.

The spelling of 23817240 in words is "twenty-three million, eight hundred seventeen thousand, two hundred forty".